Edge-trimming machine.



L. M. PECK.

EDGE TRIMMING MACHINE. 'APPLICATION FILED AUG-l5, 191a.

" WITNESS- LOTTIE M. PECK, OF BRAINTREE, MASSACHUSETTS.

, EDGE-TRIMMING MACHINE.

neonate.

Specification of Letters Patent. Patented Apr. J15, 19119..

Application filed August 15, 1918. Serial No..250,046.

To all whom it may concern:

Be it: known that I. Lo'r'rrn 1W. PEGK, a a citizen of the UnitedStates, residing at Braintree, in the county of Norfolk, in the State-ofMassachusetts, have invented a certain new and useful Improvement inEdge- Trimming Machines, of which the following is a specification,reference being had to the accompanying drawings.

The object of this invention is to provide means for rapidly andaccurately trimming the linings of shoes and more that portion of suchlinings'which is to be trimmed into parallel relation to those portionsof the uppers where the buttons or studs, as the case may be, are to belocated. Tn thus trimming the lining it is-desirable and customary totrim slightly back from the edge of the upper and this has been aparticularly awkward and uncertain operation because of the fact thatthe upper lies on top of and hides the lining from view during thetrimming operation. Mypresent improvement provides a novel constructionof undercutting knife and gage which automatically locates the cut edgeof the lining a given distance back from the edge. of the upper.

In order to explain my invention clearly I have provided the annexeddrawings, in which Figure 1 is'a plan view of a machine work tablehaving mounted thereon a cutting tool embodying my present improve ment,and also showing, as in the act of being trimmed a section of lining andsuperposed leather upper. Fig. 2 is an under side plan of the saidimproved tool.

.Fig. 3 is an edge view of the work table and of the work mounted and ofsaid tool, and in Fig. 4 I have shown the said tool in perspective.

Referring to these drawings the letter a indicates a portion of thework-supporting table of an edge-trimming machine. 7) denotes a portionof a leather upper and 0 a piece of partly trimmed cloth liningunderlying said upper. Secured to the table a i by means of. a fulcrumscrew or bolt 07 is an arm e which is given a rapid vibratory movement(as indicated by dotted lines in articularly Fig. 1), by means of an arm9 which carries a stud k that is a blade 71 whose outer or free end isturned down as at 2" and notched as at i to provide a' knife whosecutting edge lies in a plane at a right angle to the plane of the arm e.

Mounted on the knife blade 2' is a gage plate k which is secured inplace, as here shown, by a. clamp screw m which extends through anelongated slot 70, the arrange n ent of the gage plate and blade 2''being such that the gage may "be adjusted longitudinally on the saidplate, within the limits of the slot k.

When it is desired to use my described trimmer the gage is firstadjusted on the knife blade so that the outer end of the gage isslightly back from the knife edge 5 (see Figs. 3 and 4). The arm 6 isstarted into action thus causing the knife to be vibrated rapidly andthe work to be trimmed is placed'in position on the work table, with theoutlining edge of the leather 7) abutting the end of the gage. As thecombined upper and lining c are fed forward, the vibrating knife 5 whichextends slightly underneath the leather upper, engages and trims thesaid lining, as will be best understood by reference to Fig. 1 of thedrawings, the cut edge of the lining being located automatically andaccurately by reason of the cooperative relation of the gage with theknife.

Having thus described my invention, ll claim as new and wish to secureby Letters Patent 1. The improvement in edge-trimming machineswhichconsists, in combination with a reciprocating arm, of a right-angledknife bladecarried by said arm, and a gage mounted upon said blade.

2. The improvement in edge-trimming machineswhich consists, incombination with a reciprocating arm, of a right-angled knife bladecarried "by said arm, and a gage adjustably mounted upon said blade.

LOTTIE M. PEOK.

extends up through an openmg in the table a into a slot 6 in the arm '6.Secured to the other end of the arm e

